is the valves hydraulic on the 1998/99 atoz are these not adjustable ?
that is what i was asking, as i had to tke off all drive belts not the timing belt to replace a timing cover and changed all fluids oil included and put everything back together and now it sounds like a diesel makes a right racket,took of rocker cover and everything was as dry as a bone looks like no oil reaching tappets so thought these might want checking but are they adjustable or not ? but gonna get oil round first and then look into the rocker cover again if it still sounds like a diesel lol sorry guys i only a female who likes gettin her hands dirty lol ty ev1

Have no experience of the Hyundai Atoz, but try this website for an answer

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http://www.carfolio.com/specifications/models/car/?car=127743

It seems unusual that the noise should develop after work, particularly since you changed the oil, because the top of the engine shouldn't be dry after you've just topped up the oil. Quite the opposite really.
Did the oil light go out when you stsrted it?

did not notice the oil light,but as the weather has been quite bad not been able to progress with the car but will start again in the moning ie sunday
so will keep you updated as to my results thankyou.

did not notice the oil light,but as the weather has been quite bad not been able to progress with the car but will start again in the moning ie sunday
so will keep you updated as to my results thankyou.

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right we have fixed the noisey engine whic is now purring not growling like a diesel lol we took off the rocker cover and did all valves inlet and gas now perfect so quiet had all new oil plus fluids changed also. now the problem i have is not with the engine Its the drive belts or pulleys that is making a noise souds like a dry pump noise sort of soft rubbing also not a clue what it could be sound seems to get louder as the engine heats up ! not there on initial start up !! left it running to see if fan kicked in and yes it did so any ideas guys thankyou.